Patent US4205687A successfully refreshed from Google Patents.
US940430A
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US
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Process and apparatus for neutralizing static electricity.
Assignee: CHAPMAN ELECTRIC NEUTRALIZER Co
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Filing: 1906-04-02
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Granted: 1909-11-16
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Expires: 1926-04-02
Abstract
No abstract record available.
Inventors
- 👤 William H Chapman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:02
CPC Classifications
H; H01; H01T; H01T23/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1912-11-15 | 1913-05-17 | 1913-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1916-11-15 | 1917-05-17 | 1917-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1920-11-15 | 1921-05-17 | 1921-11-16 | $7700.00 | Window Closed / Lapsed |